I would pick "B" because it because you cant find out anything else from the title
D) Different states have different precedents regarding what defines a white person as opposed to a black person.
The excerpt specifically says that what defines a person as being black "is a difference of opinion in the different states." In NC "any visible admixture of black blood" defines a person as a black person. In OH, "it depends upon the preponderance of blood. In Michigan and Virginia, "white blood must only be in the proportion of three-fourths". This shows that there is not a best way to define race. Also, B is not correct because Michigan and Virginia use the same definition so they are in agreement at least. Option C is not correct because some states do not agree with this.
The demand for the product; weather there is a similar product out there; is it a special edition or limited product.
In question like this you need to provide context like in Fahrenheit 451 on page(ex) then ask. But Montag was mostly afraid that the captain would begin to notice that he was starting to question their ways and if burning the books is really the right thing to do.